Pollen levels in the atmosphere on the Portuguese mainland will remain high until at least next Thursday, the Portuguese Society of Allergy and Clinical Immunology (SPAIC) said in its latest pollen bulletin.
The pollen present in the air on the continent comes mainly from cypress and pine trees, but also from cork oak, olive holm oak and even grasses.
Forecasts until April 18 indicate high levels of pollen in the air in Vila Real (Tras Montes and Alto Douro regions), Porto (Entre Douro and Minho), Coimbra (Beira Litoral), Castelo Branco (Inland Beira), Lisbon (Lisbon and Setubal), Évora (Alentejo) and Faro (Algarve).
In the Lisbon and Setúbal region, atmospheric pollen concentrations are high, with a predominance of pollen grains from pine, oak, cork and holm oak, as well as herbaceous grasses, sorrel, plantain, nettle and stinging nettle (includes parietaceae).
In Porto, pollen from cypress, pine, birch, oak and cork oak predominates, as well as herbaceous grasses, sorrel, nettle and nettle.
The forecast for the Azores and Madeira archipelagos indicates a week of low concentrations.
In Funchal (Autonomous Region of Madeira), atmospheric pollen concentrations are low, with a predominance of cypress and pine pollen, as well as grasses, plantains and nettles.
In Ponta Delgada (autonomous region of the Azores), also with low pollen concentrations, pollen from plane trees and cypress trees predominates, as do grasses, nettles and nettles.
The Pollen Bulletin shows weekly atmospheric pollen levels collected by reading stations in various regions of the country.